From 691680b8335fa8995b190676f53e3bcef6477b4a Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 19 Mar 2011 13:55:38 +0100 Subject: [PATCH] ath9k: add an interface for overriding the value of specific GPIO pins Some devices control antenna settings or other things through GPIO pins of the wireless interface. Add a debugfs interface for changing those and keeping them set across card resets. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/debug.c | 6 ++++++ drivers/net/wireless/ath/ath9k/hw.c | 16 ++++++++++++++++ drivers/net/wireless/ath/ath9k/hw.h | 2 ++ 3 files changed, 24 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c index 9fe86939d93e..a762cadb3ab7 100644 --- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -1119,6 +1119,12 @@ int ath9k_init_debug(struct ath_hw *ah) debugfs_create_file("regdump", S_IRUSR, sc->debug.debugfs_phy, sc, &fops_regdump); + debugfs_create_u32("gpio_mask", S_IRUSR | S_IWUSR, + sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask); + + debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR, + sc->debug.debugfs_phy, &sc->sc_ah->gpio_val); + sc->debug.regidx = 0; return 0; } diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 338b07502f1a..b170c455a40b 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1212,6 +1212,20 @@ static bool ath9k_hw_channel_change(struct ath_hw *ah, return true; } +static void ath9k_hw_apply_gpio_override(struct ath_hw *ah) +{ + u32 gpio_mask = ah->gpio_mask; + int i; + + for (i = 0; gpio_mask; i++, gpio_mask >>= 1) { + if (!(gpio_mask & 1)) + continue; + + ath9k_hw_cfg_output(ah, i, AR_GPIO_OUTPUT_MUX_AS_OUTPUT); + ath9k_hw_set_gpio(ah, i, !!(ah->gpio_val & BIT(i))); + } +} + bool ath9k_hw_check_alive(struct ath_hw *ah) { int count = 50; @@ -1500,6 +1514,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, if (AR_SREV_9300_20_OR_LATER(ah)) ar9003_hw_bb_watchdog_config(ah); + ath9k_hw_apply_gpio_override(ah); + return 0; } EXPORT_SYMBOL(ath9k_hw_reset); diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index c86eea28a88f..775c0eb10b95 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -799,6 +799,8 @@ struct ath_hw { int initPDADC; int PDADCdelta; u8 led_pin; + u32 gpio_mask; + u32 gpio_val; struct ar5416IniArray iniModes; struct ar5416IniArray iniCommon; -- 2.39.2